Use Microsoft Exchange (EWS) accounts in Mail on your Mac

Learn about using Exchange (EWS) accounts in Mail with OS X v10.6 or later.

Before you begin

OS X Snow Leopard and later support Exchange Web Services (EWS) as a connection to your Exchange server. If your Exchange server does not use EWS, check with your Exchange administrator to see if an IMAP connection to the server is available instead.

If you're using macOS High Sierra, your Exchange server must use Exchange Server 2010 or later with the latest service pack installed.

If you're using macOS Sierra or earlier, your Exchange server must use Exchange Server 2007 or later. With Exchange Server 2007, you must also have Service Pack 1 with Update Rollup 4 or later installed.

Features such as contacts and calendars can also be used with Exchange. Select the options you want to use, then click Continue.

In earlier versions of macOS, a summary sheet appears when you complete setup. If the summary is correct, click Create. If you need to make changes, click Go Back. Select "Take account online" to start using the Exchange account.

If new messages don't appear in your Exchange mailbox

If certificate authentication is enabled on the mail server, make sure that your mailbox has no more than 11,000 messages. Microsoft recommends no more than 5000 messages per Exchange mailbox.

If that isn't the issue, quit Mail, then open it again and don't select any other mailbox while Mail gets new messages. To be sure that Mail has finished downloading and indexing new messages, you can choose Window > Activity, then watch the progress of the download.

If you can't send messages from your Exchange account when SSL enabled

The SSL port setting in Mail preferences may be incorrect for your Exchange account. Check with your Exchange administrator for the correct SSL port setting.

If you can't send or receive email or connect to the Exchange server after upgrading your Mac operating system

You can then enter the internal and external server information manually.

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